Twine-cutter



AlN. GREGORY. TWINE CUTTER. APPLICATION man Au'G.26 1920.

1,379,864. Patented May 31,1921.

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Twnvncurrnn.'

Largest.

Application filed. August 26, 1920. Serial `l\To. 406,193.

To all whom'z't may concern:

Be it known that I, ALToN N. GRnGoRY, a citizen of the United States, residing at Seattle, in the county of King and State of lVashington, have inventeda certain new and useful Improvement in Twine-Cutters, of which the following is a specification. My invention relates to improvements in twine cutters and more particularly to the ring type of twine cutter vwhich is adapted to be worn on the fingeriof the user and the obj ect of my invention is to provide a twine cutter wherein the cutting edge of the knife or cutting element is disposed within an inwardly converging slot to thereby positively insure of the severing of the twine in a clean cut manner.

Another object is toprovide a twine cutter that is adapted to Vcut twine, cord or thread of yvaryingisize and of any description.

A further object is to provide a twine cutter that embodies simplicity, durability and economyin construction, that is positive and eiiicient in operation, iand'that 'will not readily get out of order.

lith .the above and other objects in view which will yappear' Aas the description proceeds, my invention yresides in the novel construction, combination, adaptation andarrangement of parts hereinafter described and claimed.v A f I,

i accomplish these objects by devices illus-r trated in the -accompanying'Y drawings wherein zv Figure, l is a view in side elevation of a twine cutter embodying the features of Ymy invention. i l

Fig. 2 isasimilar view of the same parts being broken away to vmore clearly illustrate the disposition of the cutting element.

Fig. 3 is a view in vertical transversc'section of my twine` cutter taken on a broken line 3 3 of Fig. 1.

Fig.V 4t is afragmentary view in side elevation of a modified form 'of my twine cutter adapted for cutting twine of varying sizes, and" j Fig. 5 is a view in top plan of the same.

Referring to the drawings throughout which like reference numerals indicate like parts, the numeral 10 indicates the ring or band portion of my cutter, the numeral 11 indicates a peripheral extension or lug which may be integral with or otherwise Specification of Letters Patent. v

Patented May ai, 1921.

iXedly secured to the outer surface or back portion of the said ring,"the said peripheral extension being disposed in the saine medial plane 'as thering 10 and being adaptedl to extend outwardly therefrom substantially as shown in the drawings. f "Formed in the peripheral extension 11 and in tangential relation to the` ringv 1() is a rectangular recess or opening 12, the'lower wall 13 of rwhich is formed thering'l() and the upper wall`14 and the inner v'end wall V15 of the said recess being formed by the peripheral extension 11as shown. i

Medially disposed in the peripheral extension 11 is a knife or cutting element 16, the said extension 11 being medially slit or cut in any suitable manner to receive the said knife 16; riihe cutting yedge 17 of the said knife when the latter is positioned beingadapted to project into the recess 12 as shown.

An inwardly converging groove 18 is provided in a lower wall 13 of tlie'reces's as shown more clearlyin Figs.. 2 and 3,. the said groove vbeing adapted to receivethe inner and lower 'portion of the cutting edge 1'? of the knife 16 when the latter isoperatively disposed in the extensionli as shown'in Figs. 2 and i 'Y To positively retain the knifewl in its operativev position within the peripheral eX-` tension l1, the walls or jaws 19 which are formed by the medial slittingor cutting of the vsaid Vextension are pressed together subsequent to the positioning of the knife 16 to thus clamp the said knife against movement with respect te thcfsaid extension 11. How-- cver,*the knife 16 be riveted, soldered or otherwise secured in position ifdesired. But have found in practice ,that by `merely pressing the iaws 19 together against the Y knifelthat the latter is rigidly secured in operative position ,in a very simple and'cff fective manner. i

It willibe obvious from the'foregoing jdescription and by referring to thel drawings that by'disposing the .inner end of the cut 1 ting edge 17 of the knife 16finthe converg-r ing groove 18, that a perfect cutting edgeis at all times presented to the twine 'to be severed, that the ends of the cut twine are cut Vclean and not left ragged as would occur if the cutting edge ended. abruptly against the wall 13.

In the operation of my twine cutter the twine to be severed is inserted in the openV end of the recess 12 and brought into contact with the cutting edge 17 substantially at the angle shown in full lines in Fig. 1, the doubled end of the twine lying substantially in the groove 18 during the cutting operation as will be obvious by referring to Fig. 3, the converging walls of the said groove 18 serving to guide the twine and hold the same against the cutting edge 17 to effect a clean cut.

ln the modified form illustrated in Figs. 4 and 5, l have shown a twine cutter adapted to cut twine of varying sizes, the said twine cutter comprising a ring or band 20 having an integral triangular peripheral extension 21, the sides 22 of which are tangentially disposed with respect to the periphery of the ring 20.

Pivotally mounted as at 23 in a medially disposed groove 24 formed in the extension 21 is a cap or knife holder 25, the said knife holder being arranged for limited swinging movement with respect to the extension 21 as shown in full and dot and dash lines in Fig. 4. y A flat spring 26 having its lower end riveted or otherwise fixedly secured to one of the sides 22 of the extension 21 is adapted t0 have its upper or free end bear against the rear wall or face of the knife holder 25 to thereby retain the said holder in its normal or retracted position as shown in full lines in Fig. 4 or to return the said knife holder 25 to its normal or retracted position from the advanced position shown by dot and dash lines in the said figure.

The shoulders 27 formed on the sides of the knife holder 25 are adapted to bear against the side 22 of the extension 21 when the holder 25 is in its normal position to limit the downward movement of the same, while the squared portion 28 formed on the lower and outer end of the holder 25 is adapted t0 abut the lower wall 29 of the groove 24 to limit the upward movement of the said holder as will be readily understood by referring to Fig. 4.

Medially disposed in the knife holder in the forward portion thereof is a knife or cutting element 30, the said holder being slit 0r cut in any suitable manner to receive and retain the said knife 30. rlhe major portion of the cutting edge 31 of the knife 30 is adapted to be normally disposed in the groove 24 as shown.

The knife 30 is secured in an operative position within the holder 25 in a similar manner as hereinbefore described for my preferredY form.

ln the operation of the modified form the twine to be cut is inserted in the opening formed by the knife holder 25 and the side 22 of the extension 21, and brought in contact with the cutting edge 81, the said twine during the cutting operation tending to raise the holder 25 against the relatively strong tension of the spring 26. However in the event that very heavy twine or cord is to be cut the holder 25 may assume the position shown in dot and dash lines in Fig. 4 in which position the lower and inner end of the cutting edge remains in the groove 24 to thereby present a perfect cutting edge when the knife holder' 25 is in its most advanced position.

rEhe walls of the groove 24 may if desired be formed to converge inwardly in the same manner and for the same purpose as hereinbefore described for my preferred form.

From the foregoing description taken in connection with the accompanying drawings, the advantages of the construction and of the method of operation of my improved twine cutter will be readily apparent to those skilled in the art to which my invention relates, but, while l have described the principle of operation of the invention, together with the structure which l now consider to be the best embodiment thereof, l desire to have it understood that the twine cutter shown is merely illustrative and that such changes may be made when desired as are within the scope of the invention.

What l claim is A. twine cutter comprising a ring; an integral triangular peripheral extension formed on said ring, said peripheral eXtension having a longitudinal groove formed therein; a knife holder; a lug on said holder adapted to pivotally connect said holder to said peripheral extension; shoulders on said lug adapted to contact with said extension t0 limit the swinging movement of said holder in a downward direction; a stop on s said lug adapted to contact with the bottom of said longitudinal groove to limit the swinging movement of said holder in an upward direction; a knife medially disposed in said holder having its cutting edge normally disposed in said longitudinal groove; and resilient means adapted to retain said knife holder in a normally retracted posi* tion.

ln witness whereof, l hereunto subscribe my name this 20th day of August A. D. 1920.

ALllON N. GREGRY. 

